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Russian
00:00:00
in distant times, the Galician prince Yaroslav Vladimirovich lived in Russia00:00:05
and he was not short of wisdom,00:00:06
so they called him Yaroslav, and the very00:00:09
thought 8 thoughts in his head he could keep00:00:12
everything at the same time, and the damned boyars00:00:14
pacified eggplant caviar, he00:00:17
could scoop up a spoon and put a bastard on the throne,00:00:19
but that’s all fairy tales out in life rumors about the00:00:22
multitasking of the human brain are00:00:24
greatly exaggerated. Anyone who has tried00:00:26
to solve some problem and at the same time00:00:28
rewrite 1000 working hours knows00:00:30
that any attempt to complete a million things00:00:33
at once leads to a confusion of mental00:00:36
tasks and that literally makes us stupider and00:00:38
takes a lot of energy many times over. reduces00:00:41
efficiency, in other words, people are by00:00:43
nature rather single-tasking, but00:00:45
computers and modern operating00:00:47
systems, on the contrary, are quite truly00:00:50
multi-tasking, but this was not always the case,00:00:52
so today we will find out how00:00:54
computers became multi-tasking, what does this00:00:56
mean and how does it work, and most importantly,00:00:59
what does multi-core processors have to do with it?00:01:00
Let's find out which operating systems are the00:01:02
most multitasking and find out if it's true00:01:05
that multitasking on smartphones is not00:01:07
real, so the presidential driver is with you00:01:12
[music]00:01:15
in general, you quickly get used to good things,00:01:17
now when you work at a computer, you open a00:01:20
billion million tabs in Chrome,00:01:22
a thousand work chats, you work with00:01:24
documents and at the same time watch00:01:26
YouTube00:01:28
This level of multitasking is easily00:01:30
handled by corporate laptops; they00:01:32
are the main working00:01:34
tools, but how they do it, and00:01:36
so in computers, the presence or absence of00:01:38
multitasking is primarily00:01:40
determined by the system, but what does this00:01:43
term mean in general,00:01:44
initially all you had was single-tasking; in00:01:46
such systems, tasks were performed00:01:48
sequentially, that is one after another, for00:01:51
example, the good old m s doses is one00:01:53
for the country operating system and you know,00:01:56
such simple operating systems are still00:01:57
actively used in various household00:01:59
appliances, refrigerators, like cars,00:02:02
or on the simplest push-button phones00:02:04
that we used to use before the00:02:06
good old legs there were only tasks but00:02:09
wait nokia a lot of cute things a00:02:11
second before the world record my00:02:13
mother could call the snake and I had to00:02:15
answer and nothing bad00:02:16
happened, you could calmly accept00:02:19
the call and then continue playing from the00:02:21
same place isn’t that multitasking00:02:23
no at this point the system it just00:02:26
stopped one process, switched to00:02:28
another, and then came back00:02:29
just like the human brain, so00:02:32
you know, we all look a little like an00:02:34
old woman at night, but real00:02:36
multitasking ones can perform00:02:38
several processes in parallel, well, or00:02:40
pseudo boards,00:02:41
we’ll talk about this now, but it turns out that all modern00:02:44
multitasking UAZs do00:02:46
essentially the same thing, they stop00:02:48
thinking one thought in order to launch a second00:02:50
and then a third and so on, but at the same time the00:02:52
switching occurs so quickly00:02:54
that the illusion is created that everything is00:02:57
happening at the same time, but what then is the00:02:59
difference between multitasking and single-tasking00:03:01
with the fact that a multitasking00:03:03
operating system can interrupt a00:03:05
task in progress at almost any00:03:07
moment and transfer resources to a waiting00:03:09
task; systems such as a hard general00:03:12
keep processes under strict control and00:03:14
decide for themselves which task at a given moment00:03:16
can claim the processor for and00:03:18
time, and they do this very quickly00:03:21
billions of times per second and by the way such00:03:23
the type of multitasking is called00:03:24
advantage to us or preempting which00:03:27
task to preempt which to give00:03:28
priority00:03:29
is determined by the scheduler of the operating00:03:31
system but that's not all in fact00:03:34
modern understand just multitasking00:03:36
they are multithreaded what is the difference00:03:38
look at multitasking systems the00:03:40
minimum unit that00:03:42
the scheduler can manage is a program one00:03:44
program equals one process and all00:03:47
we can do is switch between00:03:48
processes, and in multi-threaded systems, each00:03:52
program can have several threads,00:03:53
that is, for a task, so the scheduler00:03:55
can switch between threads, which00:03:57
allows us to reduce delays and00:03:59
distribute resources much more rationally.00:04:02
This property of quickly switching00:04:04
between threads allows us00:04:05
use a bunch of programs at the same time00:04:07
and quickly switch between them,00:04:09
or let’s say a good example of a program00:04:11
that uses the00:04:13
capabilities to help him accurately, this is our00:04:14
lady, not a voracious chrome browser,00:04:16
each tab except this is a separate00:04:18
process and with several threads,00:04:21
this is clearly visible if you open the00:04:22
task manager, here are a few small ones00:04:24
chromes take up your processor; moreover,00:04:26
each process can ask the00:04:28
operating system to deploy another00:04:30
process to perform various tasks, and00:04:32
for each such process you need to allocate a00:04:34
certain amount of00:04:36
RAM, but there are also plugins that00:04:38
are also processes and all sorts of00:04:40
services and other things that load00:04:42
not only the central the processor is also00:04:44
graphically shorter than chrome over a real00:04:47
monster, but it even has its own separate00:04:48
task manager, to open it on00:04:51
Windows, press shift + searches, it00:04:53
can be made through the menu, I’ll go out, and then here’s what,00:04:56
to perform each of these processes00:04:58
you need your own processor, but not physically, but00:05:00
logically, for example the md ryzen 700:05:04
5700u chip has 8 physical cores in my laptop today,00:05:07
each of which00:05:09
can work as two virtual00:05:11
threads, as a result we get 1600:05:13
simultaneously running threads, some00:05:15
of which can run quickly at00:05:17
low frequencies, and the most demanding ones00:05:19
can be given an increased00:05:22
operating frequency up to 4.33 gigahertz now00:05:26
you understand why chrome lives so much00:05:27
RAM drains the battery in laptops with00:05:30
inefficient resource allocation00:05:31
to efficiently execute hundreds of small00:05:34
processes you need, firstly, many cores and00:05:36
secondly, the ability00:05:38
to manage their performance, for example, this is how00:05:40
modern processors work, and00:05:42
they have each the bucket can be a00:05:43
manufacturer or energy efficient00:05:45
By the way, in the fight against chrome, there are other00:05:47
methods to reduce the load on hardware, if00:05:49
it’s interesting, we’ll make a separate video,00:05:51
write in the comments and don’t forget00:05:53
about the subscription bell squirrel By the way,00:05:55
today we are conducting tests on business00:05:56
laptops Lenovo view 14 jen 2 with an00:06:00
md ryzen processor and eight00:06:02
gigabytes of ram, but the main thing here00:06:04
is the processor, the larger the processor, the better the00:06:06
multitasking and multi-core is an00:06:08
ember feature, they basically released the00:06:10
first dual-core processor for so far this00:06:12
was the athlon 64 x2 in 2005, and they,00:06:17
with their zen architecture, were able to to make00:06:18
really cool eight-core00:06:20
processors for study here it costs md00:06:23
ryzen 75 thousand seven hundred eighty 1600:06:26
thread this means or maybe temporarily00:06:28
performs 16 threaded tasks, that is, in00:06:30
parallel without any prefixes and00:06:32
pseudo, which makes this laptop super00:06:34
responsive the application loads quickly00:06:36
switching between running ones00:06:38
programs work instantly00:06:40
with multiple desktops, also without00:06:42
problems, which is a point for a corporate00:06:44
laptop, and something else is that all eight00:06:46
Yasin can be run at a peak00:06:48
clock frequency of 4 and 3 gigahertz; on the00:06:51
other hand, there is an energy-efficient00:06:52
mode in which the total heat dissipation is00:06:54
below 15 watts in general for multitasking00:06:57
and corporate tasks, md00:07:00
ryzen processors on architecture for two, this is a straight00:07:02
top-end thing; moreover, there is an00:07:04
additional powerful built-in graphics00:07:06
andr don therefore, but it can easily be00:07:08
used not only for typical00:07:10
office tasks such as working with documents00:07:13
or mail, but also to work with heavy00:07:15
applications with 2d and 3d graphics with00:07:17
external 4k displays do not stream video00:07:19
without brakes hold conferences with00:07:22
special effects such as replacing the background and heaps and00:07:24
participants, which is especially important00:07:26
remotely, what else is important is security00:07:28
itself, the zen architecture of00:07:30
ryzen processors is not so susceptible to00:07:32
vulnerabilities in firstly, all the nodes, especially00:07:34
against the backdrop of outdated architectural solutions00:07:36
from many competitors, and secondly, there00:07:38
is a built-in security module tpm00:07:40
2.0 that encrypts everything and everyone according to the00:07:43
standards of corporate security of00:07:45
business infrastructure00:07:46
and of course it is needed to install00:07:48
windows, one of which is difficult to00:07:50
imagine today current ultrabook for00:07:52
business only for the camera, there are00:07:54
also corporate products for00:07:56
privacy guarantees, summing up the Ryzen00:07:58
5700 you are the coolest solution for its00:08:00
segment 816 eleven threads are well00:08:03
balanced and hundreds of background processes00:08:04
run without slowdowns and lags,00:08:07
and if you cut the real load, then the00:08:09
full power of the zen architecture comes into play the00:08:11
frequency of 43 gigahertz is also used, the00:08:14
wine wowwe 14 laptop boasts00:08:17
excellent battery life up to 21 hours00:08:20
of use, small dimensions, the whole thing is00:08:21
only one and a half kilograms, and of course the00:08:23
competitive price for an exemplary00:08:25
multitasking laptop is a very decent00:08:27
deck of trump cards, but we still have a00:08:29
few important questions, which00:08:30
operating system itself is the00:08:33
most multitasking efficient and most distributed00:08:35
parallel computing and it turns out that00:08:37
all the popular UAZ is actually00:08:39
multitasking multithreaded even00:08:41
multiprocessor preemptive00:08:43
operating systems which the system00:08:45
includes windows and unix and linux and00:08:47
accordingly even includes mac cheese00:08:50
which is based on unix and android00:08:52
which is based on leftist but why?00:08:54
then multitasking on smartphones and00:08:55
tablets is considered inferior,00:08:57
let's look at it, it turns out that at the level of00:08:59
Ios and Android systems,00:09:02
they allow you to cause a real adult00:09:04
moment of puzzlement just like on accessible00:09:07
operating systems, but Google and Apple block00:09:10
this opportunity, why in fact, for a00:09:12
very simple reason, multitasking00:09:13
is a resource-intensive thing which loads00:09:16
the processor and eats up the battery, while it00:09:17
is clear that on small screens00:09:18
full-fledged multitasking is practically00:09:21
not necessary, so to ensure that your smartphone does not00:09:23
run out of charge in a couple of hours and the Go interface is00:09:25
smooth, responsive, mobile ujas00:09:28
uses a slightly different approach to00:09:29
multitasking and this is how it works,00:09:31
here each application can be located00:09:33
in 4 states non-working active background00:09:37
suspended let's look at the00:09:39
doctrine before the application is launched it is in a00:09:41
non-working state but after clicking00:09:43
on the icon the application is loaded into RAM and00:09:46
goes into the active state at this00:09:48
moment it fully works and00:09:50
consumes system resources but as00:09:52
soon as you minimize the application it immediately00:09:54
starts from the active background, that00:09:56
is, the application is not visible, but it also00:09:59
works, and after a few seconds00:10:00
the application is suspended; it00:10:03
still hangs in memory but is not00:10:05
executed. This is the approach on the00:10:08
one hand to instantly launch00:10:09
applications when you return to them,00:10:11
on the other hand it does not consume resources in the background and00:10:13
answer the old question: is it necessary to00:10:15
manually close all these applications flying in the00:10:16
memory, definitely no, such00:10:19
applications do not eat up the battery, they00:10:21
just temporarily hang in the00:10:23
RAM, but if the RAM runs out,00:10:25
the system itself crashes and loads, and00:10:27
this is true for modern versions of00:10:29
ios and android however, there are00:10:31
exceptions: some applications are00:10:32
allowed to hang in background tasks for as long00:10:36
as they want, for example, music00:10:37
navigation players, email clients00:10:40
and messenger, in this case a00:10:42
certain amount of resources are actually wasted,00:10:43
so with a third-party application it is very00:10:46
difficult to get background00:10:48
activity privileges, but on Android it’s a little bit00:10:50
simpler, unlike nuclear power plants, there is00:10:52
the concept of a service that can work in the00:10:55
background, so on Android it is00:10:57
much easier to implement background00:10:59
activity of applications and in this way Android is00:11:01
more like an adult with all the00:11:03
attendant pluses, but this is a different00:11:05
body if you liked the video, click00:11:07
like and subscribe bell so that others00:11:09
don’t miss it, and if you liked the00:11:11
Lenovo business laptop, after all, 14 Jen 200:11:14
based on aim for Ryzen, dive through the link00:11:16
in the description, thank the Citylink store for00:11:18
providing the laptop,00:11:20
thank you all for looking at this, Boris Vedensky was with you,00:11:22
this is the driver and we’ll meet you00:11:25
[music]Description:
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